[INFO] updating cached repository gfreezy/bitcask-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gfreezy/bitcask-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gfreezy/bitcask-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/gfreezy/bitcask-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/gfreezy/bitcask-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gfreezy/bitcask-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gfreezy/bitcask-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gfreezy/bitcask-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 04fabaaf969b18319475ba6cebafde3d690aa5e5
[INFO] sha for GitHub repo gfreezy/bitcask-rs: 04fabaaf969b18319475ba6cebafde3d690aa5e5
[INFO] validating manifest of gfreezy/bitcask-rs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gfreezy/bitcask-rs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gfreezy/bitcask-rs
[INFO] finished frobbing gfreezy/bitcask-rs
[INFO] frobbed toml for gfreezy/bitcask-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/gfreezy/bitcask-rs/Cargo.toml
[INFO] started frobbing gfreezy/bitcask-rs
[INFO] finished frobbing gfreezy/bitcask-rs
[INFO] frobbed toml for gfreezy/bitcask-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gfreezy/bitcask-rs/Cargo.toml
[INFO] crate gfreezy/bitcask-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing gfreezy/bitcask-rs against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gfreezy/bitcask-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 585fdd9a698619efb7036550c349f9b288ec441a4cf10594b17d4770e6730a6e
[INFO] running `"docker" "start" "-a" "585fdd9a698619efb7036550c349f9b288ec441a4cf10594b17d4770e6730a6e"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.15
[INFO] [stderr]    Compiling serde v1.0.75
[INFO] [stderr]    Compiling regex v1.0.4
[INFO] [stderr]    Compiling integer-encoding v1.0.5
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling io-at v0.4.1
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling flate2 v1.0.2
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]    Compiling serde_derive v1.0.75
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling serde-value v0.5.2
[INFO] [stderr]    Compiling log v0.4.4
[INFO] [stderr]    Compiling serde_yaml v0.7.5
[INFO] [stderr]    Compiling serde_yaml v0.8.2
[INFO] [stderr]    Compiling failure v0.1.2
[INFO] [stderr]    Compiling log4rs v0.8.0
[INFO] [stderr]    Compiling bitcask-rs v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(nll)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/keys_iterator.rs:25:15
[INFO] [stderr]    |
[INFO] [stderr] 25 |     iter: Box<Iterator<Item = &'a Key> + 'a>,
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = &'a Key> + 'a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/keys_iterator.rs:30:22
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn new(iter: Box<Iterator<Item = &'a Key> + 'a>) -> StoreKeysIter<'a> {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = &'a Key> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/store.rs:125:38
[INFO] [stderr]     |
[INFO] [stderr] 125 |     pub fn keys<'a>(&'a self) -> Box<Iterator<Item = &'a Key> + 'a> {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = &'a Key> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/store.rs:174:38
[INFO] [stderr]     |
[INFO] [stderr] 174 |     pub fn keys<'a>(&'a self) -> Box<Iterator<Item = &'a Key> + 'a> {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = &'a Key> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/lib.rs:34:23
[INFO] [stderr]    |
[INFO] [stderr] 34 | use std::sync::{Once, ONCE_INIT};
[INFO] [stderr]    |                       ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/lib.rs:36:21
[INFO] [stderr]    |
[INFO] [stderr] 36 | static INIT: Once = ONCE_INIT;
[INFO] [stderr]    |                     ^^^^^^^^^ help: replace the use of the deprecated item: `Once::new()`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `bitcask-rs`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "585fdd9a698619efb7036550c349f9b288ec441a4cf10594b17d4770e6730a6e"`
[INFO] running `"docker" "rm" "-f" "585fdd9a698619efb7036550c349f9b288ec441a4cf10594b17d4770e6730a6e"`
[INFO] [stdout] 585fdd9a698619efb7036550c349f9b288ec441a4cf10594b17d4770e6730a6e